EditorialPresident Obama Presents the National Medals of Science & National Medals of Technology and Innovation in Washington, D.C, District of Columbia, United States - 20 Nov 2014
Editorial?/? ???, Bowl, Sui (581?618)?Tang (618?907) dynasty, 7th century, China, Porcelain with white glaze, H. 3 1/4 in. (8.3 cm); Diam. 4 1/2 in. (11.4 cm), Ceramics, Although refined white clay with a high percentage of the silicate mineral kaolin(the prima...